Investments - Schedule of Credit Losses Recognized in Net Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Realized capital gains and losses by asset type
Total fixed income securities	$ (76)	$ (115)
Commitments to fund line of credit, commercial mortgage loans and bank loans	(15)	1
Fixed income securities
Realized capital gains and losses by asset type
Total fixed income securities	(1)	4
Corporate
Realized capital gains and losses by asset type
Total fixed income securities	(1)	4
Bank loans
Realized capital gains and losses by asset type
Total credit losses by asset type	(8)	3
Other assets
Realized capital gains and losses by asset type
Total credit losses by asset type	$ (52)	$ (123)